Recording medium, recording apparatus, and reading apparatus

Abstract

In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a recording apparatus and a reading apparatus easily and accurately determine the physical characteristics of the disc, thereby making it possible to provide suitable setting for performing an operation.

1. A disc shaped recording medium, comprising:
 a recording track formed by a groove on said recording medium, the groove representing predetermined information by wobbling of the groove, wherein 
 said predetermined information includes a parameter indicative of the value of the write power level at high recording speed, a value of the write power level at low recording speed, a highest constant linear velocity recording speed, a lowest constant linear velocity recording speed, a erasing/recording power ratio at highest and lowest recording velocities and a manufacturer code which indicates the disc manufacturer. 
 
   
   
     2. The disc shaped recording medium according to  claim 1 , wherein
 a frequency of the wobbling the groove indicates rotation control information of said recording medium. 
 
   
   
     3. The disc shaped recording medium according to  claim 1 , wherein the predetermined information represented by the wobbling of the groove includes address information.